Midnight is the transition from one day to the next and is typically represented as 12:00 AM. 12:00 AM signifies the start of the new day and is the beginning of the first hour of the day.

In the 12-hour clock system, which is commonly used in the United States, midnight is represented as 12:00 AM. The abbreviation AM stands for “ante meridiem,” which means “before noon” in Latin. Therefore, 12:00 AM is the time that occurs before noon, or the start of the morning.

On the other hand, 12:00 PM (noon) is the transition from morning to afternoon and is the beginning of the second half of the day. PM stands for “post meridiem,” which means “after noon” in Latin. Therefore, 12:00 PM is the time that occurs after noon, or the start of the afternoon.